Filter frame



FIG. 1 is a front perspective view of the filter frame;

FIG. 2 is a front view of the filter frame;

FIG. 3 is a rear view of the filter frame;

FIG. 4 is a top view of the filter frame;

FIG. 5 is a bottom view of the filter frame; and,

FIGS. 6 and 7 are lateral side views of the filter frame.

The portions shown in broken lines in FIGS. 1–7 depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a filter frame, as shown and described. 